Spiralock^® Made-to-Order Fasteners

Potted (with Epoxy) or Mechanically Installed Self-locking Insert

(NAS1832 type) Honeycomb Panel Mechanical Fastening Hardware

Materials:
Titanium Alloy: 6AL4V per AMS 4928 or AMS 4965
Aluminum Alloy: 6061 – T6 per AMS 4150
Stainless Steel: 316 per AMS 5648
Other materials as required

Note:
Threads are per Spiralock^® thread standard SPL-9018

Finish:
Anodize, Passivate, Dry Film Lube, CAD
Other finishes as required

Installation Tab:
Installation tab furnished in plastic or AL Alloy, adhesive backed

 

Thread Size	Spiralock® P/N	"A" Min. - Max.	"B" Min. - Max.	"C" Min. - Max.	"D" Min. - Max.	"E" Min. - Max.	"F" Min. - Max.	"G" Min. - Max.	Weight (lbs)
#4-40	FE04-40-0015	.370-.375	.040-.060	.190-.200	.302-.322	.200-.220	.122-.132	.276-.284	0.0020
#6-32	FE06-32-0035	.432-.442	.040-.060	.220-.240	.365-.385	.240-.260	.148-.158	.311-.319	0.0028
#8-32	FE08-32-0027	.495-.500	.040-.060	.280-.300	.428-.448	.300-.320	.172-.182	.363-.371	0.0058

 

Double-hex (12-Point) Nuts

Material: Alloy steel, 48 HRC Max.; other materials available upon request
Coating / Plating: Per customer requirements

* Sizes #8 through 1" are available on made-to-order basis
** Thread pitch diameter to bearing surface

 

Spiralock® Thread Size*	Width Across Flats	Nut Height Max	Flange Diameter Max.	Perpendicularity**
¼ - 28	0.376 - 0.367	0.300	0.460	0.003
5/16 - 24	0.439 - 0.430	0.363	0.560	0.004
3/8 - 24	0.502 - 0.492	0.425	0.670	0.005
7/16 - 20	0.564 - 0.553	0.488	0.770	0.006
½ - 20	0.627 - 0.616	0.550	0.870	0.007

 

Captive Washer Nuts

Materials:
Nut: Alloy Steel with Cadmium Plate
Washer: Carbon Steel with Dry Film Lube

Metric sizes and other materials are also available

 

 

Spiralock® Thread Size*	Width Across Flats	Nut Height Max.	Flange Diameter Max.
#8 - 36	0.220	0.170	0.340
#10 - 32	0.250	0.188	0.380
¼ - 28	0.312	0.219	0.460
5/16 - 24	0.375	0.266	0.560
3/8 - 24	0.437	0.282	0.660
7/16 - 20	0.500	0.328	0.760
½ - 20	0.562	0.480	0.860
9/16 - 18	0.687	0.540	1.000
5/8 - 18	0.750	0.600	1.100
¾ - 16	0.875	0.720	1.310
7/8 - 14	1.000	0.800	1.480
1 - 12	1.125	0.960	1.690

 

Captive Belleville Washer Nuts

Materials:
Nut: 17–4 PH, Condition H1025
Washer: 17–7 PH, Condition H1050
Coating / Plating: As required

**Overall height will vary as spring is compressed
Metric sizes and other materials are also available

 

Size	Width Across Flats	Nut Height **	Flange Diameter Max.	Minimum Spring Load	Maximum Spring Load
1/4 - 28	.312	.22 - .37	.68	200	1200
5/16 - 24	.375	.30 - .41	.80	250	1600
3/8 - 24	.438	.32 - .43	.87	250	2000
7/16 - 20	.500	.36 - .47	.93	TBD	TBD

 

MS21042 and MS21043 Equivalent Nuts

This nut is equivalent to MS21042 and MS21043 except for the prevailing torque feature that is replaced by the Spiralock^® locking thread technology.

Nut characteristics:
- Thin-walled (reduced hex for thread size)
- High strength
- Precision

Material:
Carbon Steel; 18-8 Stainless Steel; Alloy A286
Coating / Plating:
- Cadmium plate per QQ-P-416, Type II, Class 2 and Dry Film Lube per MIL-PRF-46010
- Silver plate per AMS 2410 and wax

 

Spiralock® Thread Size	Width Across Flats	Nut Height Max.	Flange Diameter Max.	Perpendicularity
#2 - 56	0.125	0.100	0.167	0.0025
#4 - 40	0.156	0.125	0.206	0.003
#6 - 32	0.187	0.141	0.244	0.003
#8 - 32	0.218	0.188	0.290	0.003
#10 - 32	0.250	0.188	0.330	0.003
¼ - 28	0.312	0.219	0.420	0.003
5/16 - 24	0.375	0.266	0.520	0.004
3/8 - 24	0.437	0.282	0.620	0.004