01981
View detailed technical data, stock status, and sourcing information for: 01981
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An externally threaded fastener whose threaded portion is of one nominal diameter, no 0 (0.060 in.) (1.5 mm) or larger. It has a round unthreaded neck or shank all or part of which is of greater diameter than the threaded portion. The head is designed to be driven with either a wrench or an inserted driver or both in sizes below no. 10 (0.190 in.) (5 mm) nominal diameter. No. 10 (0.190 in.) (5 mm) and larger sizes must be designed for any type of inserted driver, but may also provide for external wrenching of the head. A locking feature may be incorporated in the design of the head or threads. For items which are both shouldered and have an externally relieved body, use screw, externally relieved body. For items with a no. 10 (0.190 in.) (5 mm) or larger thread diameter without an inserted driver head, use bolt, shoulder. Excludes:bolt, internal wrenching and screw, cap, socket head.
right-hand thread direction, 1.180 inches minimum and 1.220 inches maximum fastener length, 3a thread class, 0.413 inches minimum and 0.463 inches maximum thread length, flat chamfer 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
- 3a
- Thread Direction
- right-hand
- Thread Length
- 0.413 inches minimum and 0.463 inches maximum
- Fastener Length
- 1.180 inches minimum and 1.220 inches maximum
- Head Style
- flat chamfer
- Head Diameter
- 0.420 inches minimum and 0.440 inches maximum
- Head Height
- 0.190 inches minimum and 0.210 inches maximum
- Shoulder Diameter
- 0.3095 inches minimum and 0.3110 inches maximum first shoulder
- Shoulder Length
- 0.757 inches minimum and 0.767 inches maximum first shoulder
- Shank Unthreaded Hole Diameter
- 0.070 inches minimum and 0.080 inches maximum first hole
- Internal Drive Style
- slot
- Nominal Thread Diameter
- 0.250 inches
- Thread Quantity Per Inch
- 28
- Minimum Tensile Strength
- 170000 pounds per square inch
- Distance From Head Largest Bearing Surface To Shank Hole Center
- 1.067 inches minimum and 1.077 inches maximum first hole
- Shoulder Shape
- round first shoulder
- Material
- steel comp 631 overall
- Surface Treatment
- passivate overall
- Surface Treatment Document And Classification
- hrps161,fscm 81873 mfr ref single treatment response overall
- Thread Series Designator
- unf
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FAQs
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When the NSN 5305-00-229-3662 was assigned to the Federal Catalog?
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