NAS6303 Thru NAS6310

NAS Bolts – NAS6303 Thru NAS6310

Bolt, Hex Head, Close Tolerance, A-286, Short Thread, Self-Locking & Non-Locking

Jet-Tek is a manufacturer and distributor of NAS Bolts. Blanks in all diameters available which can be completed in 2-3
weeks based on your requirement. Parts include Manufacturer and material certifications with chemical and physical test
reports at no charge. Contact us at (800) 804-7876 for a free quote, or pleasesubmit a RFQ
here.

Figure I – Bolt Configuration

Table I – NAS Bolt Dimensions

Basic Number	Nom Thread Size	C	D Diameter				E Dia Min	H	J	K Dia	M	N	P	R Rad	T	TD Dia	U Max	W Min
			Un-Plated	Before Chrome Plating	Before Cad Plate or Al Coating	After Plating or Coating
NAS6303	.1900-32	.376 .367	.1895 .1890	.1850 .1845	.1887 .1881	.1895 .1885	0.335	.125 .110	.088 .073	.056 .046	.174 .154	.18 .20	.080 .070	.020 .010	0.323	.1840 .1810	0.039	0.41
NAS6304	.2500-28	.439 .429	.2495 .2490	.2450 .2445	.2487 .2481	.2495 .2485	0.398	.140 .125	.098 .083	.056 .046	.180 .160	.24 .26	.086 .076		0.37	.2440 2410	0.045	0.48
NAS6305	.3125-24	.502 .492	.3120 .3115	.3075 .3070	.3112 .3106	.3120 .3110	0.46	.171 .156	.119 .104	.080 .070	.192 .172	.30 .32			0.438	.3060 .3020	0.052	0.552
NAS6306	.3750-24	.564 .554	.3745 .3740	.3700 .3695	.3737 .3731	.3745 .3735	0.523	.203 .188	.140 .125		.193 .173	.37 .39	.116 .106	.025 .015	0.454	.3680 .3640		0.623
NAS6307	.4375-20	.690 .678	.4370 .4365	.4325 .4320	.4362 .4356	.4370 .4360	0.648	.234 .219	.161 .146		.209 .189	.43 .45			0.528	.4310 .4260	0.062	0.764
NAS6308	.5000-20	.752 .741	.4995 .4990	.4950 .4945	.4987 .4981	.4995 .4985	0.71	.265 .250	.182 .167		.208 .188	.49 .51		.030 .020	0.528	.4930 .4880		0.836
NAS6309	.5625-18	.877 .865	.5615 .5610	.5570 .5565	.5607 .5601	.5615 .5605	0.835	.296 .281	.203 .188		.217 .197	.55 .57	Â	.035 .020	0.594	.5550 .5500	0.068	0.978
NAS6310	.6250-18	.940 .928	.6240 .6235	.6195 .6190	.6232 6226	.6240 .6230	0.898	.327 .312	.223 ‘208		.217 .197	.61 .63	.151 .141	.040 .025	0.626	.6180 .6120		1.05

Material:A-286 per AMS 5731 or AMS 5737. Locking element – plastic per MIL-F-18240 and
QPL18240.

Heat Treat:160 ksi minimum ultimate tensile, 95 ksi minimum ultimate shear.

Finish:Unplated – Passivated to meet requirements of NAS4003.
Cadmium Plated – Cadmium plate per GQ-P-416, Type II, Class 2. Parts plated to Class 3 may be used until stock depleted.
Embrittlement test per OQ-P-416 does not apply.
Chromium Plated – Chromium plate per QQ-C-320, Class 2 on shank only. All other surfaces cadmium plated. No chromium
within .020 of line of tangency of head-to-shank fillet. Chromium in thread runout permitted. Chromium plated bolts not
available with grip dash number 1 or 2.

Table II – NAS Bolt Grip and Length (± .015)

Grip Dash No.	Grip ± .010	6303 .1900-32	6304 .2500-28	6305 .3125-24	6306 .3750-24	6307 .4375-20	6308 .5000-20	6309 .5625-18	6310 .6250-18
1	.062	.385	.432	.500	.516	.590	.590	.656	.688
2	.125	.448	.495	.563	.579	.653	.653	.719	.751
3	.188	.511	.558	.626	.642	.716	.716	.782	.814
4	.250	.573	.620	.688	.704	.778	.778	.844	.876
5	.312	.635	.682	.750	.766	.840	.840	.006	.938
6	.375	.698	.745	.813	.829	.903	.903	.969	1.001
7	.438	.761	.808	.876	.892	.966	.966	1.032	1.064
8	.500	.823	.870	.938	.954	1.028	1.028	1.094	1.126
9	.562	.885	.932	1.000	1.016	1.090	1.090	1.156	1.188
10	.625	.948	.995	1.063	1.079	1.153	1.153	1.219	1.251
11	.688	1.011	1.058	1.126	1,142	1.216	1.216	1.282	1.314
12	.750	1.073	1.120	1.188	1.204	1.278	1.278	1.344	1.376
13	.812	1.135	1.162	1.250	1.266	1.840	1.340	1.406	1.438
14	.875	1.198	1.245	1.313	1.329	1.403	1.403	1.469	1.501
15	.938	1.261	1.308	1.376	1.392	1.466	1.466	1.532	1.564
16	1.000	1.323	1.370	1.438	1.454	1.528	1.528	1.594	1.626
17	1.062	1.385	1.432	1.566	1.516	1.880	1.590	1.656	1.688
18	1.125	1.448	1.495	1.563	1.579	1.653	1.653	1.719	1.751
19	1.188	1.511	1.558	1.626	1.642	1.716	1.716	1.782	1.814
20	1.250	1.573	1.620	1,688	1.704	1.778	1.778	1.844	1.876
21	1.312	1.635	1.682	1.750	1.766	1.840	1.840	1.906	1.938
22	1.375	1.698	1.745	1.813	1.829	1.903	1.903	1.969	2.001
23	1.438	1.761	1.808	1.876	1.892	1.966	1.966	2.032	2.064
24	1.500	1.823	1.870	1.938	1.954	2.028	2.028	2.094	2.126
25	1.562	1.885	1.932	2.000	2.016	2.090	2.090	2.156	2.188
26	1.625	1.948	1.995	2.063	2.079	2.153	2.153	2.219	2.251
27	1.688	2.011	2.058	2.126	2.142	2.216	2.216	2.282	2.314
28	1.750	2.073	2.120	2.188	2.204	2.278	2.278	2.344	2.376
29	1.812	2.135	2.182	2.250	2.266	2.340	2.340	2.406	2.458
3O	1.875	2.198	2.245	2.313	2.329	2.403	2.403	2.469	2.501
51	1.938	2.261	2.308	2.376	2.392	2.466	2.466	2.532	2.564
32	2.000	2.323	2.370	2.438	2.454	2.528	2.528	2.594	2.626
34	2.125	2.448	2.495	2.563	2.579	2.653	2.653	2.719	2.751
36	2.250	2.573	2.620	2.688	2.704	2.778	2.778	2.844	2.876
38	2.375	2.698	2.745	2.813	2.829	2.903	2.903	2.969	3.001
40	2.500	2.823	2.870	2.938	2.954	3.028	3.028	3.094	3.126
42	2.625	2.948	2.995	3.063	3.079	3.153	3.153	3.219	3.251
44	2.750	3.073	3.120	3.188	3.204	3.278	3.278	3.344	3.376
46	2.875	3.198	3.245	3.313	3.329	3.403	3.403	3.469	3.501
48	3.000	3.323	3.370	3.438	3.454	3.528	3.528	3.594	3.626
50	3.125	3.446	3.495	3.563	3.579	3.653	3.653	3.719	3.751
52	3.250	3.573	3.620	3.688	3.704	3.778	3.778	3.844	3.876
54	3.375	3.698	3.745	3.813	3.829	3.903	3.903	3.969	4.001
56	.3.500	3.823	3.870	3.938	3.954	4.028	4.028	4.094	4.126
58	3.625	3.948	3.995	4.063	4.079	4.153	4.153	4.219	4.251
60	3.750	4.073	4.120	4.188	4.204	4.278	4.278	4.344	4.376
62	3.875	4.198	4.245	4.313	4.329	4.403	4.403	4.469	4.501
64	4.000	4.323	4.370	4.438	4.454	4.528	4.528	4.594	4.626
66	4.125	4.448	4.495	4.563	4.579	4.653	4.653	4.719	4.751
68	4.250	4.573	4.620	4.688	4.704	4.778	4.778	4.844	4.876
70	4.375	4.698	4.745	4.813	4.829	4.903	4.903	4.969	5.001
72	4.500	4.823	4.870	4.938	4.954	5.028	5. 028	5. 094	5.126
74	4.625	4.948	4.995	5.063	5.079	5.153	5.153	5.219	5.251
76	4.750	5.073	5.120	5.188	5.204	5.278	5.278	5.344	5.376
78	4.875	5.198	5.245	5.313	5.329	5.403	5.403	5.469	5.501
80	5.000	5.323	5.370	5.438	5.454	5.528	5.528	5.594	5.626
82	5.125	5.248	5.495	5.563	5.579	5.653	6.653	5.719	5.751
84	5.250	5.573	5.620	5.688	5.704	5.778	5.778	5.844	5.876
86	5.375	5.698	5.745	5.813	5.829	5.903	5.903	5.969	6.001
88	5.500	5.823	5.870	5.938	5.954	6.028	6.028	6.094	6.126
90	5.625	5.946	5.995	6.063	6.079	6.153	6.153	6.219	6.251
92	5.750	6.073	6.120	6.188	6.204	6.278	6.278	6.344	6.376
94	5.875	6.198	6.245	6.313	6.329	6.403	6.403	6.469	6.501
96	6.000	6.323	6.370	6.438	6.454	6.528	6.528	6.594	6.626

NOTE: ABOVE CHART MAY ALSO BE USED FOR NAS 6203 THRU 6210 LENGTH CALCULATIONS.

Intermediate and longer lengths maybe specified by use of whole grip dash numbers only. Nominal grip dimension equals
grip dash number times 0.0625 (rounded to three decimal places). Nominal length equals nominal grip plus “T”.