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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.