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Fast Facts:

  • Ideal for attaching components in electronic assemblies.
  • For softer materials. Ideal for use with plastic.
  • Available in ultrasonic and pressed-in versions.
  • Made to order. Available in brass or steel.
Spiralock® Micro Threaded Inserts

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

SPL Potted 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

Potted Insert Diagram

 

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

Captive Washer NutsThis 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

 

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The availability of the products described on this site, and the product descriptions, may vary from country to country. Consult your STANLEY® Engineered Fastening Account Executive or your local distributor for specific product information.