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GGG-R-791H
SUPERSEDING
GGG-R-791 G
July 10, 1987
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FEDERAL SPECIFICATION
RULES, MEASURING
This specification is approved by the Commissioner,
Fedcml Supply Service, General
Services Administration, for the use of all Fedetnl agencies.
i. SCOPE AND CLASSIFICATION
1.I ~. This specification covers measuring rules used for English, mernc, or a mmbination
of English and metric measurements.
1.1.1
Fedeml specifications do not cover all varieties of the
wmmcdity indicated by the title of the spcciticntion, or which are commercially available, but are
intended to cover only those generally used by the Fedeml GOVCMMCISL
1.2 ~.
1.2.1 ~. The mensuring rules covered by this specification shall be of the
following types, classes. and styles, as specified (see 6.1):
Type I - Caliper
Type 11 - carpenters’ folding
Type Ill
- Multiple folding
class I
- wood
Style I
- Standard duty, inside reading
Style 2 - Standard duty, outside reading
style 3
- Heavy duty, outside rcadin& with extension slide
class 2
- steel
class 3
- Aluminum
Type IV - Steel, machinists’
class 1
- Rigid
class 2
- Flexible
Type VI
- Glozicrs
class 1
- Plain cap
class 2
- Hook Ulp
Type Vi] - Blacksmiths’
Type VIII
- Key seat
Typs 1X
- Hook
Type X
- Circumference
Type Xl - Shrinkage
Type XII
- Aluminum, one-piece
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