Model: MIL-S-21472

Shoulder Screw

Properties:

Thread Class
3a
Thread Direction
Right-hand
Thread Length
Between 0.418 inches and 0.438 inches
Fastener Length
1.000 inches
Head Style
Flat chamfer
Head Diameter
Between 0.419 inches and 0.438 inches
Head Height
Between 0.209 inches and 0.219 inches
Shoulder Diameter
0.3085 inches first shoulder and 0.3105 inches first shoulder
Shoulder Length
0.567 inches first shoulder and 0.577 inches first shoulder
Internal Drive Style
Hexagon
Thread Diameter
0.250 inches
Width Across Flats
0.156 inches
Thready Qty Per Inch (tpi)
20
Min. Tensile Strength (psi)
80000 pounds per square inch
Minimum Yield Strength
40000 pounds per square inch
Shoulder Shape
Round first shoulder
Part Name Assigned By Controlling Agency
Screw, shoulder
Material
Nickel alloy 400
Material Specification
Qq-n-281, cl a federal specification single material response
Thread Series Designator
Unc
NSN
5305-01-358-9591
Part Number
MIL-S-21472
Description
Screw,shoulder
CAGE
81349

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.

Part MIL-S-21472 NSN 5305-01-358-9591

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
22846
FIIG:
A003B0
Concept No.:
App. Key:
SL
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
A
ESD:
ESD:
MMAC:
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
--
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
E
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
139820
UFC:
70220
LTL:
85.0
LCL:
--
WCC:
713
TCC:
Z
SHC:
9
ACC:
Construction Materials

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Schedule B and Export
  • Schedule B: 7508900000
  • SITC: 69975
  • End Use: Finished metal shapes
  • NAICS: 332999
  • USDA: 1

Freight Class: Other articles of nickel, nesoi (excluding cloth, grill & netting of nickel wire)

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