Secure Ordering: +1 (757) 528-8028

Worldwide distributor of NSN parts and consumables located in the USA.

Spacing Threaded Standoff

Model / MPN: 14290-H-SS-1.000-12(B-1/4-20) | NSN: 5340-01-429-2431
ITAR Registered seal

A standoff that must have a threaded en (s) or be internally threaded its full length. For items having external threads on both ends, see stud (as modified). For items with an outside contour that is the same for the entire length, are flat on top and bottom, having internal threads its full length, and the length does not exceed twice the width across the flats or outside diameter, see nut (as modified); use dimensions(s) for compliance.

Product Details
NATO Stock Number
Sold in multiples of
Thread Class
2a right external
Thread Class
2b left internal (includes through thread)
Thread Direction
Right-hand left internal (includes through thread)
Thread Direction
Right-hand right external
Thread Length
0.484 inches right external and 0.516 inches right external
Thread Length
0.375 inches left internal (includes through thread)
1.000 inches
Cross-sectional Shape
Width Across Flats
0.500 inches
Thready Qty Per Inch (tpi)
20 right external
Thready Qty Per Inch (tpi)
32 left internal (includes through thread)
Thread Size
0.190 inches left internal (includes through thread)
Thread Size
0.250 inches right external
Right Projection Diameter
0.250 inches
Right Projection Length
Between 0.484 inches and 0.516 inches
Steel comp 303
Material Specification
Qq-s-764 federal specification single material response
Surface Treatment
Surface Treatment Specification
Mil-f-14072 e300 military specification single treatment response
Style Designator
Left internal and right external thread
Thread Series Designator
Unc right external
Thread Series Designator
Unf left internal (includes through thread)

Pricing and Availability

Send us a request for quote using the form below. Our team will contact you with an up to date pricing and availability quote ASAP.

Email Address:
Phone Number:
Your name:
Privacy    Terms

Certified Quality Assurance  Quality check icon

  •   ISO 9001:2015 + AS9120B
  •   Counterfeit Parts Prevention
  •   100% Product Inspections
  •   7 Year Record Retention
  •   On Time Delivery
  •   HAZMAT Certified
  •   Worldwide Shipping
14290-H-SS-1.000-12(B-1/4-20) Cross Reference
  • 91004V0024-1