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HN948B20-440

View detailed technical data, stock status, and sourcing information for: HN948B20-440

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HN948B20-440
Federal Supply Group
Hardware and Abrasives
Federal Supply Classification
5305 Screws
National Stock Number
5305-00-013-3957
Item Name Code
06657
Assigment Date
01/01/1963 (63 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.

right-hand thread direction, 0.625 inches nominal fastener length, 2a thread class, 0.625 inches nominal thread length, flat countersunk head style

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
0.625 inches nominal
Fastener Length
0.625 inches nominal
Head Style
flat countersunk
Head Diameter
0.207 inches minimum and 0.225 inches maximum
Internal Drive Style
slot
Nominal Thread Diameter
0.112 inches
Thread Quantity Per Inch
40
Countersink Angle
80.0 degrees minimum and 82.0 degrees maximum
Screw Material
copper alloy
Screw Material Document And Classification
qq-b-611-canc fed spec single material response
Screw Surface Treatment
nickel
Thread Series Designator
unc
Nondefinitive Spec/Std Data
1 type and 2s style

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
HN948B20-440 Machine Screw

FAQs

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

What is the FSCG of the NSN 5305-00-013-3957?
The FSCG of the NSN 5305-00-013-3957 is 5305
Does the NSN 5305-00-013-3957 have a Schedule B code assigned?
Yes, the Schedule B code is 7415338550
Does NSN 5305-00-013-3957 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 5305-00-013-3957 contain precious materials?
Precious metal content is unknown
Does NSN 5305-00-013-3957 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 5305-00-013-3957 was assigned to the Federal Catalog?
It was assigned 63 years ago, on Tue, Jan 1, 1963

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