SAE J995

SAE J995 Specification

SAE J995 defines 3 grades if nuts grade 2,5 & 8.

Scope

SAE J995 Standard Steel Nuts – Available at Adfast Component LTD

Adfast Component LTD offers high-quality steel nuts conforming to the SAE J995 standard, ensuring superior strength and durability for automotive and engineering applications. We provide Grade 2, 5, and 8 nuts in sizes ranging from 1/4 to 1-1/2 inches, manufactured to meet the dimensional requirements of ASME B18.2.2 and ASME B18.6.3 standards.

Our SAE J995 nuts are designed for high-performance fastening solutions, delivering reliable mechanical strength and material integrity. Whether for light-duty or high-stress applications, Adfast Component LTD ensures precision-engineered nuts to meet your project requirements.

Related Specifications

Chemical Composition

Nut Grade	C Max	Mn Min	P Max	S Max
2	0.55	–	0.1 2 ⁽²⁾	0.1 5 ⁽³⁾
5	0.55	0.3	0.05 ⁽⁴⁾⁽⁵⁾	0.15⁽³⁾⁽⁵⁾
8	0.55	0.3	0.04	0.05⁽⁶⁾
All values are forladle analys is (percent by weight) and subject to standard variations for check analys is as given in SAE j409. Resulfurized and rephosphorized material is not subject to reject ion based on check analys is for sulfur. If agreed between purchaser and producer, sulfur content may be 0.23 maximum. Phosphorus content may be 0.1 3 m aximum for acid bessemer steel only. If agreed between purchaser and producer, sulfur content may be 0.35 maximum and phosphorus content may be 0.1 2 maximum provided that manganese content is 0.70 minimum. If agreed between purchaser and producer, sulfur content may be 0.33 maximum provided that manganese content is 1.35 minimum .

Mechanical Requirements

Proof load
Tensile stress areas
Hardness requirements

Nut Grade	2		5				8
Nut Size	1/4 thru 1-1/2	1/4 thru 1-1/2	1/4 thru 1	1/4 thru 1	Over 1 thru 1-1/2	Over 1 thru 1-1/2	1/4 thru 1-1/2	1/4 thru 1-1/2
Thread Series	UNC and 8UN	UNF , 1 2 UN and F iner	UNC and 8UN	UNF , 1 2 UN and F iner	UNC and 8UN	UNF , 12UN and Finer	UNC and 8UN	UNF, 1 2UN and Finer
Nut Type	Proof Load Stress , psi^{(1 )}	Proof Load Stress , psi^{(1 )}	Proof Load Stress , psi^{(1 )}	Proof Load Stress , psi^{(1 )}	Proof Load Stress , psi^{(1 )}	Proof Load Stress , psi^{(1 )}	Proof Load Stress , psi^{(1 )}	Proof Load Stress , psi^{(1 )}
Hex	90000	80000	120000	109000	105000	94000	150000	150000
Hex Flange	90000	80000	120000	109000	105000	94000	150000	150000
Hex Jam⁽²⁾	54000	48000	72000	65000	63000	57000	90000	90000
Heavy Hex Jam⁽²⁾	54000	48000	72000	65000	63000	57000	90000	90000
Hex Slotted⁽²⁾	71000	65000	96000	87000	84000	75000	120000	120000
Heavy Hex⁽²⁾	100000	90000	133000	120000	116000	105000	165000	150000
Hex Thick⁽²⁾	100000	90000	133000	120000	116000	105000	165000	150000
Hex Thick Slotted⁽²⁾	79000	71000	105000	96000	92000	84000	132000	120000
Hex High⁽²⁾	100000	90000	133000	120000	116000	105000	165000	150000
Hex High Slotted⁽²⁾	79000	71000	105000	96000	92000	84000	132000	120000
Square	90000	80000	105000	96000	92000	84000	132000	120000
Heavy Square	100000	90000	133000	120000	116000	105000	165000	150000
The proof load in pounds for nutsis computed by multip lying the proof load stress , in psi ( lbf/in²) , for the nut g rade, size , th read series , and type , as shownin Tab le 2 , and tensile stress area in square inches ( in²) , for the app l icab le size and th read series shownin Tab le 3.(For tabulated values see Appendix A. ) To convert the inch based pounds per square inch (psi ) values above to metric Megapascal (MPa) units , multip ly the above values by.00689 . Proof load stress values for hex jam , heavy hex jam , hex slotted , heavy hex, hex thick, heavy hex slotted , and hex thick slotted nuts are based on the requiremen t for hex nuts.primarily, each value is derived from the ratio of the minim um thickness of the productinvo lved tothe minimum thickness of similar hex or square machine screw nuts and hex nuts (see B1 8.2.2 ) of the same size .

Coarse Thread Series UNC Nominal Size and Threads Per Inch	Coarse Thread Series UNC Tensile Stress Area, sq in.	Fine Thread Series UNF Normal Size and Threads Per Inch	Fine Thread Series UNF Tensile Stress Area, sq in.	8-Thread Series 8 UN Normal Size and Threads Per Inch	8-Thread Series 8 UN Tensile Stress Area, sq in.
1/4- 20	0.0318	1/4- 28	0.0364	–	–
1/4- 20	0.0318	1/4- 28	0.0364	–	–
5/16- 18	0.0524	5/16- 24	0.0580	–	–
3/8- 16	0.0775	3/8- 24	0.0878	–	–
7/16- 14	0.1063	7/16- 20	0.1187	–	–
1/2- 13	0.1419	1/2- 20	0.1599	–	–
9/16- 12	0.182	9/16- 18	0.203	–	–
5/8- 11	0.226	5/8- 18	0.256	–	–
3/4- 10	0.334	3/4- 16	0.373	–	–
7/8- 9	0.462	7/8- 14	0.509	–	–
1-8	0.606	1- 12	0.663	1-1/8	0.606
1-1/8- 7	0.763	1-1/8- 12	0.856	1-1/8-8	0.790
1-1/4- 7	0.969	1-1/4- 12	1.073	1-1/4-8	1.000
1-3/8- 6	1.155	1-3/8- 12	1.315	1-3/8-8	1.233
1-1/2- 6	1.405	1-1/2- 12	1.581	1-1/2-8	1.492

Nut Grade	Nominal Nut Size	Hardness
2	1/4 thru 1-1/2	32 HRC max
5	1/4 thru 1-1/2	32 HRC max
8	1/4 thru 5/8	24- 32 HRC
8	Over 5/8 thru 1	26- 32 HRC
8	Over 1 thru 1-1/2	26- 32 HRC

Proof Load UNC
Proof Load UNF
Proof Load 8UN

Nominal Nut Size and Threads Per Inch	Hex and Hex Flange Nuts			Hex Jam and Heavy Hex Jam Nuts			Hex Slotted Nuts
Nominal Nut Size and Threads Per Inch	Grade 2	Grade 5	Grade 8	Grade 2	Grade 5	Grade 8	Grade 2	Grade 5	Grade 8
1/4- 20	2850	3800	4750	1750	2300	2850	2250	3050	3800
5/1 6- 18	4700	6300	7850	2800	3750	4700	3700	5050	6300
3/8- 16	7000	9300	11600	4200	5600	7000	5500	7450	9300
7/1 6- 14	9550	12800	15900	5750	7650	9550	7550	10200	12800
1/2- 13	12800	17000	21300	7650	10200	12800	10100	13600	17000
9/1 6- 12	16400	21800	27300	9850	13100	16400	12900	17500	21800
5/8- 11	20300	27100	33900	12250	16300	20300	16050	21700	27100
3/4- 10	30100	40100	50100	18000	24000	30100	23700	32100	40100
7/8- 9	41600	55400	69300	25000	33300	41600	32800	44400	55400
1- 8	54500	72700	90900	32700	43600	54500	43050	58200	72700
1-1/8- 7	68700	80100	114000	41200	48100	68700	54200	64100	91600
1-1/4- 7	87200	102000	145000	52350	61000	87200	68800	81400	116000
1-3/8- 6	104000	121000	173000	62350	72800	104000	82000	97000	139000
1-1/2- 6	126000	148000	211000	75850	88500	126000	99750	118000	169000

Nominal Nut Size and Threads Per Inch	Heavy Hex, Hex Thick, Hex High and Heavy Square Nuts			Heavy Hex Slotted, Hex High Slotted and Hex Thick Slotted Nuts			Square Nuts
Nominal Nut Size and Threads Per Inch	Grade 2	Grade 5	Grade 8	Grade 2	Grade 5	Grade 8	Grade 2	Grade 5	Grade 8
1/4- 20	3200	4250	5250	2500	3350	4200	2850	3350	4200
5/1 6- 18	5200	6950	8650	4150	5500	6900	4700	5500	6900
3/8- 16	7750	10300	12800	8100	8150	10200	7000	8150	10200
7/1 6- 14	10600	14100	17500	8400	11200	14000	9550	11200	14000
1/2- 13	14200	18900	23400	11200	14900	18700	12800	14900	18700
9/1 6- 12	18150	24200	30000	14350	19100	24000	16400	19100	24000
5/8- 11	22600	30100	37300	17800	23700	29800	20300	23700	29800
3/4- 10	33300	44400	55100	26350	35100	44100	30100	35100	44100
7/8- 9	46050	61400	76200	36400	48500	61000	41600	48500	61000
1- 8	60450	80600	100000	47700	63600	80000	54500	63600	80000
1-1/8- 7	76300	88500	126000	60300	70200	101000	68700	70200	101000
1-1/4- 7	96900	112000	160000	76550	89100	128000	87200	89100	128000
1-3/8- 6	115500	134000	191000	91250	106000	152000	104000	106000	152000
1-1/2- 6	140500	163000	232000	111000	129000	185000	126000	129000	185000
Values computed by multiplying the strength values (psi) by the tensiles tress area (in²) . The values are rounded to the closest 50-pound increment. To convert the inch based pounds values above to metric based Newtons (N) multiple the values above by 4. 448.

Nominal Nut Size and Threads Per Inch	Hex and Hex Flange Nuts			Hex Jam and Heavy Hex Jam Nuts			Hex Slotted Nuts
Nominal Nut Size and Threads Per Inch	Grade 2	Grade 5	Grade 8	Grade 2	Grade 5	Grade 8	Grade 2	Grade 5	Grade 8
1/4- 28	2900	4000	5460	1750	2400	3300	2400	3200	4350
5/1 6- 24	4650	6300	8700	2800	3750	5200	3750	5050	6950
3/8- 24	7000	9550	13150	4200	5700	7900	5700	7650	10550
7/1 6- 20	9500	13000	17800	5700	7700	10700	7700	10350	14250
1/2- 20	12800	17450	24000	6700	10400	14400	10400	13900	19200
9/1 6-18	16250	22150	30450	9750	13200	18250	13200	17650	24350
5/8-18	20500	27900	38400	12300	16650	23000	16650	22250	30700
3/4- 1 6	29850	40650	55950	17900	24250	33550	24250	32450	44750
7/8- 1 4	40700	55500	76350	24450	33100	45800	33100	44300	61100
1-12	53050	72300	99450	31800	43100	59650	43100	57700	79600
1-1/8-12	68500	80450	128400	41100	48800	77050	55650	64200	102700
1-1/4-12	85850	100850	160950	51500	61150	96550	69750	80500	128750
1-3/8-12	105200	123800	197250	63100	74950	118350	85500	98600	157800
1-1/2-12	126500	148600	237150	75900	90100	142300	102750	118600	189700

Nominal Nut Size and Threads Per Inch	Grade 2	Grade 5	Grade 8	Grade 2	Grade 5	Grade 8	Grade 2	Grade 5	Grade 8
Nominal Nut Size and Threads Per Inch	Heavy Hex, Hex Thick, Hex High and Heavy Square Nuts			Heavy Hex Slotted, Hex High Slotted and Hex Thick Slotted Nuts			Square Nuts
1/4- 28	3300	4400	5460	2600	3500	4350	2900	3500	4350
5/1 6- 24	5200	7000	8700	4100	5550	6950	4650	5550	6950
3/8- 24	7900	10550	13170	6250	8450	10550	7000	8450	10550
7/1 6- 20	10700	14250	17805	8450	11400	14250	9500	11400	14250
1/2- 20	14400	19200	23985	11350	15350	19200	12800	15350	19200
9/1 6-18	18250	24350	30450	14400	19500	24350	16250	19500	24350
5/8-18	23000	30700	38400	18200	24600	30700	20500	24600	30700
3/4- 1 6	33550	44750	55950	26500	35800	44750	29850	35800	44750
7/8- 1 4	45800	61100	76350	36150	48850	61100	40700	48850	61100
1-12	59650	79550	99450	47100	36650	79550	53050	36650	79550
1-1/8-12	77050	89900	128400	60800	71900	102700	68500	71900	102700
1-1/4-12	96550	112650	160950	76200	90150	128750	85850	90150	128750
1-3/8-12	118350	138100	197250	93350	110450	157800	105200	110450	157800
1-1/2-12	142300	166000	237150	112250	132800	189700	126500	132800	189700
Values computed by multiplying the strength values (psi) by the tensile stress area ( in²) . The values are rounded to the closest 50-pound increment.

Nominal Nut Size and Threads Per Inch	Hex and Hex Flange Nuts			Hex Jam and Heavy Hex Jam Nuts			Hex Slotted Nuts
Nominal Nut Size and Threads Per Inch	Grade 2	Grade 5	Grade 8	Grade 2	Grade 5	Grade 8	Grade 2	Grade 5	Grade 8
1-8	54550	72700	90900	32700	43650	54550	39400	58200	72700
1-1 /8-8	71100	83000	118500	42650	49750	71100	51350	66350	94800
1-1 /4-8	90000	105000	150000	54000	63000	90000	65000	84000	120000
1-3/8-8	110950	129450	184950	66600	77700	110950	80150	103550	147950
1-1 /2-8	134300	156650	223800	80550	94000	134300	97000	125350	179050

Nominal Nut Size and Threads Per Inch	Heavy Hex, Hex Thick, Hex High and Heavy Square Nuts			Heavy Hex Slotted, Hex High Slotted and Hex Thick Slotted Nuts			Square Nuts
Nominal Nut Size and Threads Per Inch	Grade 2	Grade 5	Grade 8	Grade 2	Grade 5	Grade 8	Grade 2	Grade 5	Grade 8
1-8	60600	80600	100000	47850	63650	80000	54550	63650	80000
1-1 /8-8	79000	91650	130350	62400	72700	104300	71100	72700	104300
1-1 /4-8	100000	116000	165000	79000	92000	132000	90000	92000	132000
1-3/8-8	123300	143050	203450	97400	113450	162750	110950	113450	162750
1-1 /2-8	149200	173050	246200	117850	137250	197000	134300	137250	197000
Values computed by multiplying the strength values (psi) by the tensile stress area ( in² ) . The values are rounded to the closest 50-pound increment.

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SAE J995

SAE J995 Specification

Table of Contents

Scope

SAE J995 Standard Steel Nuts – Available at Adfast Component LTD

Related Specifications

Chemical Composition

Mechanical Requirements

Coating Specifications

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Threading Specifications

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