Bumper Standoffs

BPM – Male Thread Bumper® Standoffs

Download Product Flier

3D CAD Models available. Contact a PENCOM Account Representative to request.

Part Description Example

  • BPMSeries
  • 440Thread
    Code*
  • 1.500Length
  • STLBody
    Material
    Code
  • ZBody
    Finish
    Code

*For 4-40 UNC-2B thread use thread code 440, for M3 x 0.5 6H thread use thread code M3

Request A Quote

*Contact a PENCOM Account Representative for the part number based on the description.

Features

  • Male thread allows simple installation using nut and washer without special tools.
  • Installs close to sheet edge without creating any hoop stress in sheet.
bpm-features

Length

Inch

Length
± .010
1.000
1.125
1. 250
1.375
1.500
1. 625
1.750
1. 875
2.000

Metric

Length
± 0.25
26
29
32
35
38
41
44
47
50
bpm-lengthsPENCOM carries a wide assortment of standard and self-clinching nut and washer assemblies and components (self-clinching nut shown).

Body Material and Finish

Body Material CodeBody Material DescriptionBody Finish CodeBody Finish Description
STLCarbon SteelZZinc SC1 with Type III Clear Chromate per ASTM B 633
SS300 -Series Stainless SteelPPassivated and/or Tested per ASTM A 967
Tip Material and Color: Nylon UL94-V0 / White

Installation

  1. Punch or drill hole in sheet. Insert the standoff male thread through hole in sheet and secure with a female threaded fastener. In some applications it may be desirable to install a washer between the female threaded fastener and sheet.
  2. Tighten the assembly by torquing the female threaded fastener 3.2 to 4.3 in-lbs (4-40) or 0.32 to 0.43 N-m (M3). PENCOM recommends a minimum thread engagement of .112in (4-40) or 3.0mm (M3) between the male and female threads. Installation torques are for zinc-plated carbon steel standoffs and for reference only. The majority of joint tightening torque is used to overcome friction under the rotating member face. Many factors can affect the amount of resulting friction such as rotating member surface area and finish, and sheet hole size and finish. PENCOM recommends testing in the application.
  3. Due to the inelastic nature and unpredictable friction coefficients of stainless steel, torque calculations for this material can be unreliable. One method of determining the installation torque uses 50% of the failure torque as developed through testing in the application and applying a ±20% tolerance.
  4. One method of determining the installation torque uses 50% of the failure torque as developed through testing in the appliation and applying a ±20% tolerance.
bpm-install

Nut / Washer Options

The table below lists the part numbers of several plain nuts, washers, pre-assembled (KEPS) nuts, and locknuts supplied by PENCOM for use with the BPM Bumper Standoffs. For information on self-clinching nuts and other alternatives visit www.pencomsf.com or contact a PENCOM Account Manager.

TypeThreadMaterial / FinishPENCOM Part Number
4-40
UNC-2B
M3 x 0.5
6H
Zinc Plated Carbon SteelStainless Steel
Machine NutNU1042
NU1043
NU1101
NU1100
Flat
Washer
WA1413
WA1021
WA1928
WA1117
External Tooth
Lock Washer
WA1349
WA1261
WA1116
WA1115
Internal Tooth
Lock Washer
WA1201
WA1196
WA3609
WA2005
Split Lock
Washer
WA1025
WA1024
WA1327
WA1120
Conical Washer KEPS NutNU1538
NU2569
NU1412
NU2570
External Tooth Washer KEPS NutNU1045
NU1046
NU1104
NU1103
Nylon Insert Lock NutNU2026
NU1785
NU2083
NU1413