855681

View detailed technical data, stock status, and sourcing information for: 855681

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855681
Federal Supply Group
Hardware and Abrasives
Federal Supply Classification
5305 Screws
National Stock Number
5305-00-993-2460
Item Name Code
06657
Assigment Date
01/01/1962 (64 years ago)

An externally threaded fastener whose threaded portion is of one nominal diameter, no 0 (0.060 in./1.5 mm) or larger, designed to be held or driven with either a wrench or an inserted driver or both (excluding internal socket or internal multiple spline types), in sizes below no. 10 (0.190 in./5 mm). No. 10 and larger sizes must have a head designed for any type inserted driver (excluding internal socket or internal multiple spline types), but may also be designed for external wrenching. A locking feature may be incorporated in the design of the head or threads. Excludes:bolt, clevis; bolt, externally relieved body; screw, externally relieved body; and screw, assembled washer. See also, screw, instrument; bolt, machine; bolt, internal wrenching; and screw, cap socket head.

0.804 inches minimum and 0.875 inches maximum thread length, 2a thread class, right-hand thread direction, pan head style, 0.875 inches nominal fastener length

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Thread Class
2a
Thread Direction
right-hand
Thread Length
0.804 inches minimum and 0.875 inches maximum
Fastener Length
0.875 inches nominal
Head Style
pan
Head Diameter
0.473 inches minimum and 0.492 inches maximum
Head Height
0.162 inches minimum and 0.175 inches maximum
Internal Drive Style
cross recess type 1
Nominal Thread Diameter
0.250 inches
Thread Quantity Per Inch
28
Minimum Tensile Strength
55000 pounds per square inch
Screw Material
steel comp 1010 or steel comp 1011 or steel comp 1013
Screw Material Document And Classification
66 fed std all material responses
Screw Surface Treatment
cadmium and chromate
Screw Surface Treatment Document And Classification
qq-p-416,ty 2,cl 3 fed spec single treatment response
Thread Series Designator
unf

Replaces National Stock Numbers

Below is a list of NSNs that have been officially superseded by this NSN:

NSN Name Date
5305-00-021-4420 No Name Available 10/21/1998
5305-00-144-3622 No Name Available 01/01/1960
5305-00-286-1808 No Name Available 01/01/1960
5305-00-973-5666 No Name Available 09/01/2023

Related Parts

This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:

Part Number Name
132076701FN10 Machine Screw
855681 Machine Screw
AN526-428-14 Machine Screw
MS35207-282 Machine Screw
U7527-19 Machine Screw

FAQs

Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.

What is the FSCG of the NSN 5305-00-993-2460?
The FSCG of the NSN 5305-00-993-2460 is 5305
Does the NSN 5305-00-993-2460 have a Schedule B code assigned?
Yes, the Schedule B code is 7318152000
Does NSN 5305-00-993-2460 require demilitarization?
Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.
Does NSN 5305-00-993-2460 contain precious materials?
Item does not contain precious metal.
Does NSN 5305-00-993-2460 contain hazardous materials?
Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.
When the NSN 5305-00-993-2460 was assigned to the Federal Catalog?
It was assigned 64 years ago, on Mon, Jan 1, 1962

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